Patents Examined by Nguyen N Hanh
  • Patent number: 6750578
    Abstract: A rotating machine is provided, including a rotor having a longitudinal axis with a connected fan and a stator surrounding said rotor. Front and rear frames rotatably support the rotor. At least one of said frames has a hub with a core with an opening for receiving a bearing mounting the rotor with said hub. The hub has an opening and ribs generally radially connecting the core with an outer rim of said hub. The ribs have a cross-sectional area being generally tilted with respect to a line extending generally parallel with the axis of said rotor.
    Type: Grant
    Filed: July 22, 2002
    Date of Patent: June 15, 2004
    Assignee: Delphi Technologies, Inc.
    Inventors: Duane Joseph Buening, Michael L. Hull, Steve J. Shields
  • Patent number: 6737770
    Abstract: A brushless motor for a blower fan unit has a circuit structure constituted by a drive control circuit and a fuse member. The drive control circuit supplying drive current comprises a first circuit section for eliminating surges of electric power and a second circuit section for controlling magnetic field generated by the stator. The first and second circuit sections are three-dimensionally arranged with a predetermined space therebetween. The fuse member electrically connects the first and second circuit sections. An end portion of the fuse member is welded with the first circuit section, and the other end portion of the fuse member is soldered with the second circuit section. The fuse member cuts an electrical connection between the first and second circuit sections when a temperature of solder becomes higher than a predetermined temperature.
    Type: Grant
    Filed: January 11, 2002
    Date of Patent: May 18, 2004
    Assignee: Calsonic Kansei Corporation
    Inventors: Hideki Sunaga, Takeshi Ohba, Hiromi Kawarai, Kazunori Yamada, Narihito Sano
  • Patent number: 6731027
    Abstract: A three-phase hybrid type stepping motor of the present invention comprises a stator, a rotor arranged concentrically with the stator and with an air gap therebetween, six stator poles extending radially and formed at a regular pitch on the inner peripheral surface of an annular stator yoke, each of the stator poles having a plurality of small stator teeth at the tip end thereof, the rotor having two splitted rotor elements and a permanent magnet held therebetween and magnetized so as to form N and S poles in the axial direction thereof, fifty of small rotor teeth formed at a regular pitch on the outer peripheral surface of each of the rotor elements, the two splitted rotor elements being shifted from each other in angular position by a ½ pitch of the small rotor teeth, wherein a permeance distribution of the small stator teeth is a vernier pitch balanced by a six or three order harmonic wave, and a ratio of the width of the pole tooth to the rotor teeth pitch is set to 0.35-0.45.
    Type: Grant
    Filed: February 22, 2002
    Date of Patent: May 4, 2004
    Assignee: Japan Servo Co., Ltd.
    Inventors: Kazuo Ohnishi, Toshimi Abukawa, Masafumi Sakamoto, Koki Isozaki
  • Patent number: 6717322
    Abstract: An end assembly for a miniature motor. The end assembly including a brush base, a pair of brush arms supporting brushes, and a cover plate supporting a rotor bearing. The end assembly fits into an open end of a cylindrical motor housing.
    Type: Grant
    Filed: October 9, 2002
    Date of Patent: April 6, 2004
    Assignee: New Bright Industrial Co., Ltd.
    Inventor: Keung Lee
  • Patent number: 6717323
    Abstract: A rotary electric motor has a stator with a plurality of separate and ferromagnetically isolated electromagnet core segments disposed coaxially about an axis of rotation. Core materials such as a soft magnetically permeable medium that is amenable to formation of a variety of particularized shapes. The core segments are supported by a non-ferromagnetic structure. The rotor comprises a plurality of permanent magnets with surfaces that face an air gap separation from the stator, the surfaces having a common geometric configuration. The stator pole surface geometric configuration and the rotor magnet surface geometric configuration are skewed with respect to each other. The effect of this skewing arrangement is to dampen the rate of change of the magnitude of the cogging torque that is produced by the interaction between a rotor magnet and a pole of a non-energized stator electromagnet as the permanent magnet traverses its rotational path.
    Type: Grant
    Filed: June 4, 2002
    Date of Patent: April 6, 2004
    Assignee: Wavecrest Laboratories, LLC
    Inventors: Zareh Soghomonian, Boris A. Maslov, Mark A. Benson
  • Patent number: 6717306
    Abstract: A highly precise coreless motor with improved precision of assembly in which weight is reduced by reducing the metal parts and reduction of assembly processes and time by means of a smaller number of parts brings down costs. There is a cylindrical external housing 1 with a through hole 1c in a central position in the closed end. A molded resin body 3 is molded into place through the through hole 1c of the external housing 1; one end is a bearing 3a that supports the rotating shaft, and it continues on the coaxial position of the rotating shaft to become a bearing housing 3b that is fitted into place. The molded resin body 3 is the base on which both the rotor and the stator are assembled.
    Type: Grant
    Filed: January 2, 2002
    Date of Patent: April 6, 2004
    Assignee: Namiki Seimitsu Hoseki Kabushiki Kaisha
    Inventors: Mitugu Kudou, Shouhei Kawai
  • Patent number: 6713927
    Abstract: A rotating electric machine using an inner section of a slot of a stator as a cooling passage obtains highly effective cooling performance with a small amount of cooling medium. An opening for a slot in a stator is closed by an under plate having a closing member. A regulating plate is disposed which is a member for regulating the cross-sectional area of the passage in substantially a central section of the slot. In this manner, the cross-sectional area of the cooling passage with the plate in the slot is smaller than the cross-sectional area when the regulating plate is not provided by an area corresponding to the cross-sectional area of the regulating plate. This arrangement allows increases in cooling efficiency.
    Type: Grant
    Filed: November 7, 2001
    Date of Patent: March 30, 2004
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Toshio Kikuchi, Shinichiro Kitada, Yutaro Kaneko, Takashi Tsuneyoshi
  • Patent number: 6710477
    Abstract: A double insulated rotor (10) for an electric motor has a rotor core (14) fitted to a shaft (12) by way of an insulating sleeve (24) moulded to the shaft (12).
    Type: Grant
    Filed: April 19, 2002
    Date of Patent: March 23, 2004
    Assignee: Johnson Electric S.A.
    Inventor: Kevin King Wai Lau
  • Patent number: 6707222
    Abstract: A method for making a motor and auxiliary devices with a unified stator body comprises providing a piece of material (10) having an area larger than a cross section of the stator (11), removing material from the piece of material (10) to form a pattern for a cross section of a core (11) for the stator, and removing material from the piece of material (10) outside the cross section of the core of the stator (11) to allow positioning of cores (22, 23, 24) for supporting windings (25, 26, 27) of least one additional electromagnetic device, such as a transformer (62) in a dc-to-dc converter (61, 62) that provides a low. voltage dc output. An article of manufacture made according to the invention is also disclosed and apparatus made with the method and article of manufacture are also disclosed.
    Type: Grant
    Filed: July 3, 2002
    Date of Patent: March 16, 2004
    Assignee: UT-Battelle, LLC
    Inventors: John S. Hsu, Gui-Jia Su, Donald J. Adams, James M. Nagashima, Constantin Stancu, Douglas S. Carlson, Gregory S. Smith
  • Patent number: 6703726
    Abstract: A platen used as a stator of a planar linear motor having a platen body (90) comprised of a stacked member (91) of magnetic sheets (T) giving a high performance and a backing plate. The backing plate of the stacked member (91) is formed with dovetail grooves (91a) along a direction perpendicular to the sheet edge direction. The backing plate (92) has a plurality of first through holes (92a) discretely arranged in lines longitudinally across the strip-shaped portions facing the dovetail grooves (91a). Top bent side ends (94) of connecting beam members (93) have pluralities of second through holes (94a) discretely arranged in lines longitudinally across the beam longitudinal direction. Joints (100) of a fluid hardening material injected into the dovetail grooves (91a) and the through holes (94a) (92a) to fill and harden in the same are formed.
    Type: Grant
    Filed: January 10, 2002
    Date of Patent: March 9, 2004
    Assignee: Shinano Electronics Co., Ltd.
    Inventors: Masato Itoh, Kimihiko Tanaka, Katsuhiko Takeuchi
  • Patent number: 6703738
    Abstract: An outer rotor type brushless motor comprising an outer rotor having permanent magnets fixed onto an inner periphery of a rotor yoke, a stator including a stator core having a plural of magnetic pole portions protruded on an outer periphery thereof and coils wound on the magnetic pole portions, a cylindrical boss disposed on an inner periphery of an annular portion of the stator core, a rotational shaft extending along an axis of the boss and rotationally supported on the boss through a bearing with a leading end of the shaft having a center portion of the rotor yoke fixed thereto and a mounting plate fixed onto an outer periphery of the boss wherein the boss is formed of resin mold and extending through a hole in the mounting plate and fixed thereto and the annular portion of the stator core is mounted on and fixed to a rising portion on the inner periphery of the mounting plate.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: March 9, 2004
    Assignee: Kokusan Denki Co., Ltd.
    Inventors: Rikio Yoshikawa, Katsuhiro Mochizuki
  • Patent number: 6703755
    Abstract: It is to provide a brush-equipped motor enabled to be used for a long time without performing operations and without interruption even when the brush wears out. When a rotor is caused to perform a turning operation, cam projections similarly start to perform a turning operation. Then, an abutting part, at which each of the cam projections contacts with a spring piece part of a corresponding one of the first brushes, gradually moves to an end of the first brush. Thus, the spring piece part of each of the first brushes is gradually and elastically deformed in a direction in which brush bodies come away from a commutator. When the turning operation continues still more, an end of each of the second brushes comes off a corresponding one of the cam projections, so that the brush bodies thereof contact with the surface of the commutator.
    Type: Grant
    Filed: September 6, 2002
    Date of Patent: March 9, 2004
    Assignee: Japan Storage Battery Co., Ltd.
    Inventors: Shinichi Miyamoto, Tadashi Yasui
  • Patent number: 6700267
    Abstract: A transverse flux drive includes a first component and a second component which is rotatable with respect to the first component. A pair of transverse flux motor units are coupled between the first and second components. Each motor unit includes a plurality of U-shaped armature elements which are coupled to the first component and which enclose an circumferentially extending exciter winding. Each motor unit also includes a plurality of permanent magnet pole elements coupled to the second component. The pole elements of one motor are axially movable to attenuate the magnetic flux coupling between the elements of the motor.
    Type: Grant
    Filed: January 25, 2002
    Date of Patent: March 2, 2004
    Assignee: Deere & Company
    Inventor: Heinz Weiss
  • Patent number: 6674188
    Abstract: An alternator comprising an inner housing, an outer housing mounted over the inner housing and a plurality of o-rings positioned between the inner housing and the outer housing thereby creating a sealed flow chamber having a first plenum, an axial jacket, a second plenum, a first passageway interconnecting the first plenum and the axial jacket, a second passageway interconnecting the axial jacket and the second plenum, an inlet extending from the first plenum, and an outlet extending from the second plenum. The first and second plenums are disk shaped cavities extending diametrically across the alternator, and the axial jacket is an annular jacket extending around the alternator. The first passageway is located diametrically across from the inlet and the second passageway is located diametrically across from the first passageway. The outlet is located diametrically across from the second passageway.
    Type: Grant
    Filed: March 1, 2002
    Date of Patent: January 6, 2004
    Assignee: Visteon Global Technologies, Inc.
    Inventors: Steven J. Yockey, Kevin Roy Harpenau, David William Linden, Tony Militello
  • Patent number: 6614139
    Abstract: A motor having a dynamic pressure bearing apparatus includes a fixed bearing member mounted to a motor frame, a rotating shaft member rotatably inserted with respect to the fixed bearing member and a lubricating fluid injected into a gap portion between the fixed bearing member and the rotating shaft member. The rotating shaft member is supported by a dynamic-pressure caused by the lubricating fluid. In addition, the motor frame is provided with a generally cylindrical bearing hold member that holds and fixes a bearing member. The bearing hold member includes a bearing contacting portion which abuts against the fixed bearing member or one part of the assembly including the fixed bearing member in an axial direction for positioning the fixed bearing member in a normal position in an axial direction.
    Type: Grant
    Filed: July 30, 2001
    Date of Patent: September 2, 2003
    Assignee: Sankyo Seiki Mfg. Co., Ltd.
    Inventors: Masayoshi Saichi, Takehiko Yazawa
  • Patent number: 6570292
    Abstract: A rotor is disclosed for a synchronous machine comprising: a rotor core; a super-conducting coil winding extending around at least a portion of the rotor, said coil winding having a side section adjacent a side of the rotor core; at least one tension rod extending through a conduit in said rotor core; and a housing attached to the tension rod and connected to the side section of the coil winding, wherein the housing comprises a pair of side panels.
    Type: Grant
    Filed: May 15, 2001
    Date of Patent: May 27, 2003
    Assignee: General Electric Company
    Inventors: Yu Wang, Robert John Nygard, Evangelos Trifon Laskaris, James Pellegrino Alexander